I don't think anyone is applauding this. The only people applauding stuff like this are the CEO's of Anthropic (because that means more tokens/profit). Most other CEO's in big tech have toned down the rhetoric big-time.
The job of 5 people being done with the same salary is a function of the job market. It's an employers market now. So stuff like this happens. If you had an employee's market this wouldn't happen.
fwiw - and this is a separate topic. If health insurance were de-linked from employment most people would flee the job market on their own.